INTRODUCTORY NOTE. THE preparation of the following work ran parallel with the studies which filled the life of the author, and its completion and revision for publication was his last work. It is now put forth as a fitting complement to the "Studies in Philosophy and Theology," and to the treatises on "Mental Philosophy" and on "Moral Philosophy which have been so favorably received by the public. It will, as we think, be welcomed not only by those who have been the pupils of its author, either through his lectureroom or through its works, but by that large and increasing class of thoughtful minds who will be interested in the history of what the human mind has done in "the noblest study of mankind." The labor and enthusiasm of Dr. Haven's life was largely given to the presentation of that history, as viewed from his own characteristic stand-point of full loyalty at once to the word of God and to the convictions of the human mind, first to his classes in collegiate and professional study, and afterward to those intelligent thinkers, who are still pursuing "liberal education " in the midst of the activities of adult life. It is hoped that this book may not only be found valuable for study and reference in educational institutions, but that it may continue and extend that usefulness in the general community upon which its author seemed to be entering when he was called away. BELOIT COLLEGE, WIS., February, 1876. J. EMERSON. AUTHORITIES. In the preparation of the following pages, the works of the authors themselves, so far as extant and accessible, have been the chief source of authority as to their respective systems. In addition to these, the historical statements of Aristotle, Diogenes Laertius, Plutarch, and Cicero among ancient writers-the historical works of Ritter, Tennemann, Fries, Krug, Schwegler, and Ueberweg among the Germans-of Cousin, Tissot, Renouvier among the French-of Archer Butler, and Lewes, in England, have been carefully studied in the preparation of the chapters on ancient philosophy; of whom Ritter (History of Ancient Philosophy, 4 vols.), Tennemann (Manual of the History of Philosophy), Schwegler (Geschichte der Philosophie), and Ueberweg (History of Philosophy, Vol. i.) have been the chief guides; while in modern philosophy, Schwegler (as above), Cousin (Histoire de la Philosophie, 2 vols.), Lewes (Biographical History of Philosophy), and Morell (History of Modern Philosophy) have been the principal aids. Damiron (Histoire de la Philosophie en France au XIX. Siecle), Renouvier (Manuel de la Philosophie Moderne), and Hegel (Geschichte der Philosophie, 3 vols.), have also been consulted. |